The Remoaners complaint includes the high-profile claim the EU was costing the UK £350million a week, which was plastered on the side of the Vote Leave bus

Director of Public Prosecutions Alison Saunders is reviewing the allegations made against Vote Leave and Leave.EU groups.

Tory MP Jacob Rees Mogg raged: “It is a mutton headed decision which brings the impartiality of the CPS and Ms Saunders into question.”

In the unlikely event of success it could see charges brought against bosses — and a year’s imprisonment if found guilty.

Prof Watt says says the high-profile claim the EU was costing the UK £350million a week, which was plastered on the side of the Vote Leave bus as it drove Boris Johnson around the country, was knowingly deceiving.

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